Yatjlt cover fastening



(No Model.)

G. H. ROSS.

VAULT COVER FASTENING.

N0. 283,517. Patented Aug. 21, 1883.

$51M @52 WW N. PETERS. PMIMJMp-aphnr. Wnhingwn. D. c.

UNITED STATES Fries.

ATENT TO L. OTIS DAUCHY, OF SAME PLACE.

VAULT-COVER FASTENING.

SPECIFICATION forming part of Letters Patent Na. 283,517, dated August21, 1883. Application filed J ulyli), 1883. (No model.)

To all whom it may concern:

Be it known that I, CHRISTIAN H. Ross, a

' citizen of the United States, residing at Chiand a suitable lug orsupport for the same, by

means of "which the vault-cover may be held open at any desired angleand securely locked when closed.

In the accompanying drawings, forming a part of this specifiation,Figure l is a perspective View of a circular vault-cover with myimprovement adapted thereto. Fig. 2 is a side elevation, partly insection, showing the cover opened at different angles. Fig. 3 is a sideelevation, showing the cover closed and locked; and Fig. 4 is a detailview.

A'is a ring or bed plate, usually of castiron, upon which the cover B ishinged at a. The bed-plate is provided with a lug or double catch, b,opposite the hinge a.

G is a curved arm pivoted at one end to cover B, and has at its oppositeor lower end an inwardly projection, d, and is also provided on one sidewith bolts or headed pins 6 e, adapted to fit into recesses a. a of thedouble catch or lug D. The curved bar 0 is made of such a length as toallow cover B to be thrown back at about an angle of forty-five degrees,

when its hook a will engage with the inner edge of ring or bed plate A,as shown in Fig. 2, thus holding the cover securely open without dangerof breaking off the hinge at a. In

this position the cover is opened widest. Various degrees of opening areindicated by dotted lines in Fig. 2, where the cover is supported at theangle required by resting one of the pins or bolts 6 into thecorresponding upper recess, a, of lugs D. When the cover is closed, itis locked by bolt 6, engaging with the lower recess, of, of lug D, asshown in Fig. 3.

My improved fastening may be made for sale as an article of manufacture,to be ap plied to any vault or similar cover, as shown in Fig. 4. 7

It will be seen that myinvention affords an easy and reliable means ofelevating and supporting a vault-cover at any required angle for theadmission of light, or for ventilation, or of throwing the cover Wideopen and supporting it in this position whenever required.

Curved bar 0 may be -cast or otherwise cheaply manufactured, and doesnot require the aid of springs of any kind to hold it in engagement witha catch;

I am aware that a curved bar has been used for the same purpose before.I do not therefore claim this broadly; but

What I do claim as new, and desire to secure by Letters Patent, is

-1. The curved bar 6, provided with pins or bolts 6 c and projection d,in combination with a hinged vault-cover B and bed-plate A, providedwith a double catch, D, as herein shown and for the purpose set forth.

2. As a new article of manufacture, the

curved bar 0, provided with pins or bolts 0 e CHRISTIAN HANSEN ROSS.

ll itnessesz GEO. K. DAUCHY, James J. NOBLE.

